| 翻訳と辞書 |
| Semen cryopreservation ： ウィキペディア英語版 |
Semen cryopreservation
Semen cryopreservation (commonly called sperm banking) is a procedure to preserve sperm cells. Semen can be used successfully indefinitely after cryopreservation. For human sperm, the longest reported successful storage is 22 years.〔(Planer NEWS and Press Releases > Child born after 22 year semen storage using Planer controlled rate freezer ) 14/10/2004〕 It can be used for sperm donation where the recipient wants the treatment in a different time or place, or as a means of preserving fertility for men undergoing vasectomy or treatments that may compromise their fertility, such as chemotherapy, radiation therapy or surgery.
==Freezing==
The most common cryoprotectant used for semen is glycerol (10% in culture medium). Often sucrose or other di-, trisaccharides are added to glycerol solution. Cryoprotectant media may be supplemented with either egg yolk or soy lecithin, with the two having no statistically significant differences compared to each other regarding motility, morphology, ability to bind to hyaluronate in vitro, or DNA integrity after thawing. 〔 Soy lecithin replaces egg yolk for cryopreservation of human sperm without adversely affecting postthaw motility, morphology, sperm DNA integrity, or sperm binding to hyaluronate. Michael L. Reed, Ph.D.Corresponding Author Informationemail address, Peace C. Ezeh, M.S., Amanda Hamic, B.S., Douglas J. Thompson, M.D., Charles L. Caperton, M.D. Fertility and Sterility. Volume 92, Issue 5, Pages 1787-1790 (November 2009)〕
Semen is frozen using either a controlled-rate, slow-cooling method (slow programmable freezing or SPF) or a newer flash-freezing process known as vitrification. Vitrification gives superior post-thaw motility and cryosurvival than ''slow programmable freezing''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Semen cryopreservation」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|